Concrete mold



v f i. 7n. 5 N 6 4, Z l .l 4 W2 L/ Wwf pv` L 2 2 www y? u Mmt. .RC JCO .Wd Gew. .1 F I im@ mw M aw u Patented Aeg. 21,v 1923.

The invention relates ,to

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suenen JQMCLAIN, or Losiaivsnnns', CALIFORNIA;

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' Applicationpled October 2, .19 22. Serial No. 591,835.

To'all'whom it' may] concern) Beit knownthat I, GEORGE J.' McLain, a

Acitizen'.olithesUnited States, residing at Los ngeles, County oi" Los ifingelesand State "of California, have/invented a newland usetulv Concrete Mold, of which lthe following specification,reference being had to the aeompanying drawings,forming part hereot', iniwhich n Y F 1 is a perspective view ot the assem-v bled'inold.y Fig. 2is a perspective'view with parts cut away to show the'mold clamping mechanism. Fig. 3 is a perspective view "showing al number oiE molds in position tor forming' a hollow wall. p y .j

the buildingof concrete Walls, vespecially hollow-wall concrete housespby the use of adjustable molds built for repeated use and capa-ble ot speedy "adjustment to wallsv ofvarious thicknesses, theser molds being` constructed in assorted: lengths so that a combination can b e readily made 'for walls 'of any length. i

the inner members and clamp securely to the outside of thetinished wall 16, while the 1n ner mold member rest upon the tie steel placed across the air space 15. Throughtwo holes through each of postsv 3 3, one hole being' just above the top of the outer mold member and the other near the top ot the post, is placed the threaded end of a rod l 4f with nut 5 5 and washer 6V 6 on same at both inner and outer edges of post for purposes or" adjustment, the remaining portion oi rod extending toward opposite outer mold member being flattened and containing a series of holes spaced` at regular intervals 'for the purpose of changing size or" -mold to malte walls of varying thickness. rl`wo of these flattened rods extendingr from posts atfk tached to opposite outer mold members areV connected by a plate 7 having holes near each end correspondingv in size to holes in rod. the connection being made by means of a loose rivet 8 extending through both plate and rod, said rivet being held in place by means of a Cotter pin 9 extending through same. rlhe perpendicular part of a lever 10, made of a square bar, extends through a square hole in the center OLE-platel 7, connecting vrods attop oiz posts, :and also through gp'late eonneetingrods just above mold members, a cotterpinQ ,being inserted ina hole through this'verticalportion of lever immediately above and immediately below each 'j plateH The square bar extends downward .between the two inner mold members to a point just above' the bottoniof said inner to the extent of l5l degrees, being transverse to mold members, one of these platesfbeing justV below theV top and the other just above mold members, passing throughtwo additional plates lilre those above, exceptv turned the bottom of inner mold members and being supported by a eotter pin extendingthrough aV hole in bar underneath eachplate. (See Fig; '2.) Attached to inner mold members are iron loops 1 1 llso placed that they willa groove being cut underneath them in the inner moldmemberinto which ,the end of plate extends to a point s uiiicient forhole Iin plate'to correspond to space'between moldmember 4and loop. A rod-12 so bent attop that' itlwill not'fdrop through is inserted through upper and lower loops and hole in plate underneath each loop, thus holding theY inner mold member in place. At top the horizontal. portion of lever is so arranged that itr will strike a post near top to which is attached a catch 13 by means of a screw 14 placed in lsuch a way that it will automatically catch the lever and hold it when form v is ready to be filled. vThe two upper plates being parallel with mold members and the two lower plates erosswise thereto causes one setto move in anopposite direction from the other when lever is turned. The'posts to which the levers are caught are placed nearer end oi its outer mold member than are posts on opposite outer mold member, and to compensate -tor longitudinal movement of onelever the neighboring lever works in opposite direction. Releasing the catch and turning lever away from the post causes the outer mold members to move outward and the inner mold members to move inward. thus freeing it from the wall `16, when it can be readily removed.

The form is operated by assembling' a numberof the forms of varying lengths en'd to end where the wall is to be constructed. (See Fig. 3.) They are then filled with a sloppy mixture of concrete. reinforcing steel being placed according to structural require` rest upon the ends oi the two lower plates,

j ments. lVhen concrete is sutlieientlyvset the form is 'released' by" turning levers inward, thereby releasing it Y:trom the wall, when form is removed. Short pieces of tie steel are then laid from wall to wall across the air space l5 and forms are set on top of this having a series oi adjusting` holes attached to each of two nearlyopposite posts sup'- porting,- outer mold n'iembers, plates forcen- ,necting these rods by means otfrivets rand 'eotter pins, like plates turned transversely connectingY inner moldv members by means of loops andirods, a. common operating` member lit/tino' s uare holes in center of all ot said Y b w Y Vplates, having a Cotter pin innnediately above Vand below each plate, for effecting movements ot both inner and outer mold membersin opposite directions,'an operating lever, and catch attached to post for engaging A operating` lever. all substantially as set forth.

2. la an adjustable concrete mold, the combination ot a. common vertical mperatinp,- member extending downward through tour plates', the Vtwo. upper plates parallel with 'form members and attached to adjustablf,I

'spaced holes in rods by use ot rivets and VCotter pins 'for movement of outer mold members toward and from each other, the two ing operating lever.

lowerY plates being-turned transversely upperplates and attached to Vinner mold members by use of loops and rods-for movef mentV of inner mold members toward and from each other, anoperating lever, and

catch for engagingrouter end of openatingrV V lever, eecting movements of inner and outer mold members in opposite directions. "Y 3. An adjustable concrete mold, comprising o-f'a pair of outer mold members and pair of inner moldy members, plates con-l resting on plate, saidA loop serving `as a guide for a rod running, behind an upper and lower loop through holes near ends of plate beneath each loop. A

et. An adjustable concrete mold, compris-L ing a pair of outer mold members arranged for movement toward and from each other, a, pair ot flattened rods withk a serles of adjusting holes attached to each oftwo nearly opposite posts supporting said" mold members, plates for connecting lthese rods by means otrivets and eotter pins, a common operating member fitting' squareA holes in center ojjsaid platesyhaving acotter pin above and below each plate, an operating Vvnecting inner mold members, endet plates Y .entering` recesses one Y.near top, yand one near bottom inl opposite inner mold members, the 1 vplates supportingvweight oat mold members Vby means of van iron loop attached toeach vinner mold member .above earch recess and lever, and catch'attached to post torengag- Y GEORGE J. MCLAIN. 

